mason



(No Model.) 2 Sheets-Sheet 1.

W. B. MASON. GOVERNOR FOR STEAM PUMPS.

"No. 603,026. Patented Apr. 26, 1898.

Zflz'finessess Inventor W/L b mfiw Wu KMMIi (No Model.) 2 Sheets-Sheet2.

W. B. MASON. GOVERNOR FOR STEAM PUMPS.

No. 603,026. Patented Apr. 26 1898.

l T w 2 Witnesses.-

UNITED STATES Fries.

VILLIAM l3. MASON, OF BOSTON, MASSACHUSETTS, ASSIGNOR TO THE MASONREGULATOR COMPANY, OF SAME PLACE.

GOVERNOR FOR STEAM-PUMPS.

SPECIFICATION forming part of Letters Patent No. 603,026, dated April26, 1898.

Application filed July 7, 1897. Serial No. 643,695. (No model.)

To all whom it may concern:

Be it known that 1, WILLIAM B. MASON, a citizen of the United States,residing at Boston, in the county of Suffolk and State of Massachusetts,have invented certain new and useful Improvements in Governors forSteam- Pumps, &c., of whichthe following is a specification, referencebeing had therein to the accompanying drawings.

The invention is in the nature of an improvement upon the governor forwhich United States Letters Patent No. 812,137 were granted to meFebruary 10, 1885.

The present invention relates to governors of that class in which thethrottle-valve or other controlling-valve of the pipe conveying thesteam-supply or other medium of fluidpressure is operated from a piston,the latter being acted upon by a liquid which is forced into the pressurechamber containing the said piston by means of a small pump that isconnected with and operated from some moving part of the steam-pump,engine, or the like, which is to be cont-rolled in its speed of working, the said valve thereby being operated in such manner as to govern thesupply of steam or other medium of fluid-pressure aforesaid.

The invention has reference more particularly to the piston aforesaid,the pressurechamber within which the said piston is arranged, and thedashpot or cushioning co11- trivance by means of which steadiness ofmovement of the piston and weight-lever are secured and undesirableoscillations are obviated.

The invention will be described first with reference to the accompanyingdrawings, in which is illustrated the best embodiment thereof that Ihave yet contrived, and afterernor. Fig. 3 is aview showing certainparts of the governor in vertical section on the dotted line 3 of Fig.2. Fig. 4 is a view showing certain parts of the governor in verticalsection on the dotted line 4: 4 of Fig. 2.

13 is the shell or body of the governor, to which my present inventionis shown applied.

25 is the bottom plate thereof, the said body or shell and bottom platebeing held together by means of screws 27. 9 is the bonnet or cover,which is fitted to the upper end of the said shell or body and securedthereto by screws 26, the said bonnet or cover having anupwardly-extending hub to which is fitted the ring-shaped lower end of abracket 8, the said bracket being adjustable around the said hub andsecured in a fixed position thereon by means of the nut 7, which isturned onto the threaded upper end of the said hub, and the said bracket8 having mounted thereon pivotally at 4: the weight-lever 3, the latterhaving the weight 5 secured in the desired position of adjustment uponits horizontal arm by means of the clamping-screw 6, and havingconnectedpivotally to its vertical arm at 2 the coupling-piece 1, which isintended to have applied thereto one end of the rod (not shown) thatforms part of the connec- 8o tions to the throttle or other valve whichis to be operated. The said bonnet or cover 9 and its hub are centrallybored, as shown, to receive the rod 101 of the piston 10, the up per endof the said piston-rod supporting the horizontal arm of the weight-lever3.

D is the central or interior cavity holding the oil or other fluid whichis employed within the governor.

21 is a rock-shaft which in practice is con- 0 nected with and operatedfrom some suitable moving part of the steam pump, engine, or the likewhich is to be controlled in its working. 20 is the usual forked arm,which is applied to the said rock-shaft 21. 23 is the 5 yoke, which isconnected pivot-ally with the said forked arm by means of screws 22, and24 is the pin or the like device by means of which the said yoke isjoined to the plunger 19, so that as the rock-shaft 21 is operated I00motion shall be communicated to the plunger 19 through the parts andconnections which have been described.

E E are the chambers in which the oppob said chambers to thepressure-chamber B, and i G G designate check-valves interposed betweenthe chambersE E4 and the pressure-chamber B, are or may be as heretoforeconstructed in practice or as in the 1 site ends of the. plunger 19operate, and 18 bers. G G are passages leading from the g the 1pressurechamber 13.

J 's a passage-way through which the oil 1 or other fluid that hasbeenpumped into the pressurechamberl; is allowed to return to 1 the chamberD, latbein g a needle-valve or the like regulating device by means ofwhich ;to determine the rate at which the oil or other fluid shall bepermited to flow backinto the I chamber 1). l r y y The foregoing parts,with the exception of patent aforesaid, or may be ofanyothersuitable.construction and arrangement; The j piston 10 is formed hollow-that isto say, as w .ashortliollow cylinder-it having one end thereof closed bya disk to which is applied -i the piston-rod 101 aforesaid. The flangeor i, annular portion of the piston fits intothcspace between the innersurface of the shell or body 13 and the periphery of the cupll, whichlatter is securedby screws 12150 the: ,diaphragm121 of the shell or body12,. This space constitutes the pressurechamber B. The upper portion ofthe said pressure-chamber is closed or substantially closed by the fannular portion of the piston 10, which Ihave made in practice to fitwith a close-working fit between the inner surface of shell 13 and g theouter surface of the upper part of cup 11;

but preferably the lower portion of the said pressure-chamber isenlarged somewhat by reducing the external diameter of the cup 11, asindicated in the drawings, thereby provid ing greater capacity for thereception of the oil or other fluid which is pumped through the passagesG Gr. The interior space 0 of the cup 11 constitutes the dash-potchamber, the said dash-pot chamber being inclosed by the hollow piston10, the disk of which covers the said chamber.

passage H, the latter being formed wholly in the fixed parts of thegovernor. In the drawings the said passage is shown extending downwardthrough the bottom of the cup 11, through the diaphragm 121 into theblock 122, which is provided on the underside of said diaphragm, outwardwithin the said block,

. mentyis less expensive to Communication is established between thesaid dash-pot chamber Q and the pressure-chamber by means of the andthen upward through thediaphragm and the wall of cup 11, in which lastit turns again outwardly and opens intopress nrechamber B.

- 29 is a needle-valve by means of which to regulate the'flow of thefluid through passage-way H, 28 being a'screw which serves as a cover tothe hole in which the said valv 29 is located. -A certain portion of thefluid which is pumped into pressure-chamber B finds'its way into thespace which is contained within the cup 11 and hollow piston 10,fillingrboth. The V 7 disk of the piston, it covering the cup 11', as

aforesaid, coactsw-ith the contents of said cup and of the interior ofthe piston itself in steadying the movements of the piston.

, The constructionwhich has just been de- I scribed is simplerthan thatwhich has been adopted heretofore, is compact" in arrangemore-convenientin use;

I claim as my inventiontween the said chambers andrthe hollow pistoninclosingsaiddashpot chamber, the disk of said piston ,coacting with thecontents of 1.. Theimprove'd pumpgovernorhavingthe annularpressure-chamber, the central daslt pot chamber, the restrictedpassage-way beproduce, and is V 2. The improved pump-go vernor havingthe annularpressure-chamber,the central dash pot, chamber, therestricted passage-way between the said-chambers and the hollow piston,covering the said dash-pot chamber, 00-

acting with the contents of its own interior and of the said dash-potchamber and also provided with the annular portion closing'orsubstantially closing the said pressure-chamber, substantially asdescribed.

Theimprovedpump-governorhavingthe annular pressure-chamber, the centraldashpot chamber, a passage-way communicating between thepressure-chamber and the dashpot chamber and formed in the fixed parts,a regulating-valve applied to the said passageway, and the hollowpiston, inclosin g the said dash-pot chamber, coacting with the contentsof its own interior and of the said dash-pot chamber and also providedwith the annular portion closing or substantially closing the saidpressure-chamber, substantially as described.

In testimony whereof I affix my signature in presence of two witnesses.

WVILLIAH B. MASON.

Witnesses:

WM. A. MAoLEon, CHAS. F. RANDALL.

